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The GE Fanuc IC695ALG708, also cataloged as the IC695ALG708 Analog Output Module, operates as a dedicated hardware component for multi-channel analog signal generation within PACSystem RX3i platforms.

Hardware Specifications

Parameter Specification
Model IC695ALG708
Brand GE Fanuc / Emerson
Origin USA
Weight 0.43 kg (0.94 lbs)
Dimensions Standard RX3i single-slot module
Operating Temp 0 to 60 deg C
Power Consumption 375 mA at 3.3 VDC, 315 mA at 24 VDC (7.25 W max dissipation)
Number of Channels 8
Output Voltage Ranges 0 to +10 VDC, -10 to +10 VDC
Output Current Ranges 0-20 mA, 4-20 mA
Resolution +/-10V: 15.9 bits, 0-10V: 14.9 bits, 0-20mA: 15.9 bits, 4-20mA: 15.6 bits
Calibrated Accuracy +/-0.15% of full scale at 25 deg C, +/-0.25% at 60 deg C
Output Settling Time 2 ms (0 to 95% voltage or current output)
Update Rate 8 ms (all 8 channels)
Maximum Output Load 850 ohms
External Power Supply 19.2 to 30 VDC (24 VDC nominal)
Field-to-Backplane Isolation 2550 VDC for 1 second

Backplane Bus Communication Velocity & I/O Density Scaling

The IC695ALG708 interfaces with the PACSystem RX3i backplane bus to perform continuous 8-channel analog conversions with an approximate update rate of 8 ms across all outputs. High-density channel scaling allows independent output range assignment using IEEE 32-bit floating point or 16-bit integer formats in a 32-bit field. Internal firmware flash compatibility ensures synchronized cyclic data exchange with the host controller while field-to-backplane optical isolation preserves signal integrity against electrical ground loops.

Frequently Asked Questions

Q: What are the backplane current draw requirements for the IC695ALG708 module?

A: The module requires 375 mA at +3.3 VDC from the backplane bus along with 315 mA at +24 VDC from the isolated backplane power rail, resulting in a maximum power dissipation of 7.25 W.

Q: Does the IC695ALG708 analog output module support HART communication?

A: No, HART protocol communication is not supported on this specific module hardware.

Q: What is the maximum load resistance supported on the current output channels?

A: The current outputs support a maximum loop load resistance of 850 ohms when powered within the external voltage supply range of 19.2 to 30 VDC.

Field Installation Guidelines

  1. Turn off backplane power to the PACSystem RX3i rack prior to inserting or removing the IC695ALG708 module to avoid backplane connector strain.
  2. Verify that the module is fully seated in its baseplate slot and that top and bottom retention latches are locked.
  3. Route field output cables separately from high-voltage AC lines and inductive loads to minimize induced noise on analog signal paths.
  4. Ensure the external 24 VDC power supply connection complies with the 19.2 to 30 VDC operating range and that cable shields are grounded at a single chassis ground point.

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